I don't want to sound "nasty"
(because I know how nasty I can get when it comes to electronics that I love)...
Well, if money is not an object:
GO FOR THE JS7200.This panel is not just UHD. It is a SUHD. A class of its own. The sheer sparkle of this panel's picture quality is truly amazing as far as I am concerned. Samsung calls this technology jargon as NANO CRYSTAL COLOUR. If you want to truly appreciate this panel before buying, I suggest that you bring along a demo material that you are very familiar with. (Most of the time I bring along with me a portable bluray player and I pop in LIFE OF PI and MISSION IMPOSSIBLE III as my test discs because I am very familiar with both movies.)
However, your other choice, the
J6200 is NOT bad at all, as I have been saying all along in some posts here. This panel, which is only FULL HD, has an amazing CONTRAST that makes my 1080p videos and bluray discs really stand out. It also uses MICRO DIMMING PRO to enhance black levels. Do you like gaming? Ah, the quality of PS4 gaming is excellent. No lags. No judder.
If your TV budget is a concern, you cannot go wrong with J6200. Besides, it is a 60" panel. Who wouldn't want a bigger TV these days?
Also: I love calibrating my TV. But in both cases, although I know this is highly subjective, I don't feel there is a need to calibrate the JS7200 and J6200. Even when using the STANDARD MODE, the picture quality is already excellent.